De Jeker is the lifeline of Tapijn. Where there is water, there is always something happening. Much of life within Tapijn takes place in and around the Jeker. Among the birds that live within Tapijn, there are some that depend very directly on the Jeker, namely on the banks of the Jeker. This includes the kingfisher, the grey wagtail, and the wren. All three make use of the bank of this river to their advantage.